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Match Report for Masanori Ichikawa

Masanori Ichikawa

Masanori “Othello” Ichikawa was born in Tokyo in 1973, and started playing backgammon in 1997. It was about the time that online backgammon servers and stronger software appeared on the scene. As one of the younger players, he naturally gravitated to those tools, and still uses them today to study the game. He won his first national title, "Meijin", in 2004, and has since won two more titles, including the "Japan Open" in 2019. Masanori is a member of Japan's national team which won the WBIF online team tournament in 2020. Each year, he presents a series of backgammon problems at the Japan Open. This “Othello Quiz” is later uploaded on the internet, and is widely considered to be one of the best quiz series available. The Otthello quizes, dating back 2000, can be found at https://backgammon.or.jp/?page_id=3479

Additional player info
BMAB Title:Grandmaster G1

Summary of Matches
Rating1,641.78
Experience909
Number of matches recorded81
Number of analysed matches81
PR across analysed matches - overall3.3377 (World Class)
PR across analysed matches - moves2.8065 (World Class)
PR across analysed matches - cube6.0730 (Expert)
Opponent PR across analysed matches (overall)5.3283 (Expert)
Matches won45 (55.6%)
Number of distinct opponents59
Number of clubs played at1
Earliest match recorded2015-05-14
Latest match so far2025-11-13
Peak rating1,680.28
Peak rating (>400 exp.)1,680.28
Average opponent rating1,597.86

► Charts

[Graph of rating by experience] Match locationsWBIF: Matches: 81 (45 won, 36 lost) Experience: 909 (529 points won, 380 lost) Win rate: 55.56% Average opponent rating: 1,597.86 WBIF: Matches: 81 (45 won, 36 lost) Experience: 909 (529 points won, 380 lost) Win rate: 55.56% Average opponent rating: 1,597.86 win/loseWBIF: Matches: 81 (45 won, 36 lost) Experience: 909 (529 points won, 380 lost) Win rate: 55.56% Average opponent rating: 1,597.86 WBIF: Matches: 81 (45 won, 36 lost) Experience: 909 (529 points won, 380 lost) Win rate: 55.56% Average opponent rating: 1,597.86 WBIF (81) Match lengths5-point: Matches: 19 (8 won, 11 lost) Experience: 95 (40 points won, 55 lost) Win rate: 42.11% Average opponent rating: 1,678.09 5-point: Matches: 19 (8 won, 11 lost) Experience: 95 (40 points won, 55 lost) Win rate: 42.11% Average opponent rating: 1,678.09 13-point: Matches: 61 (36 won, 25 lost) Experience: 793 (468 points won, 325 lost) Win rate: 59.02% Average opponent rating: 1,571.43 13-point: Matches: 61 (36 won, 25 lost) Experience: 793 (468 points won, 325 lost) Win rate: 59.02% Average opponent rating: 1,571.43 21-point: Matches: 1 (1 won, 0 lost) Experience: 21 (21 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,685.49 21-point: Matches: 1 (1 won, 0 lost) Experience: 21 (21 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,685.49 win/lose5-point: Matches: 19 (8 won, 11 lost) Experience: 95 (40 points won, 55 lost) Win rate: 42.11% Average opponent rating: 1,678.09 5-point: Matches: 19 (8 won, 11 lost) Experience: 95 (40 points won, 55 lost) Win rate: 42.11% Average opponent rating: 1,678.09 5-point (19) 13-point: Matches: 61 (36 won, 25 lost) Experience: 793 (468 points won, 325 lost) Win rate: 59.02% Average opponent rating: 1,571.43 13-point: Matches: 61 (36 won, 25 lost) Experience: 793 (468 points won, 325 lost) Win rate: 59.02% Average opponent rating: 1,571.43 13-point (61) 21-point: Matches: 1 (1 won, 0 lost) Experience: 21 (21 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,685.49 21-point: Matches: 1 (1 won, 0 lost) Experience: 21 (21 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,685.49 21-point (1) Matches by opponent rating0481216202428323640<100010501000-11001050-11501100-12001150-12501200-13001250-13501300-1300-1350: Matches: 1 (1 won, 0 lost) Experience: 13 (13 points won, 0 lost) Win rate: 100.00%1300-1350: Matches: 1 (1 won, 0 lost) Experience: 13 (13 points won, 0 lost) Win rate: 100.00%14001350-1350-1400: Matches: 2 (2 won, 0 lost) Experience: 26 (26 points won, 0 lost) Win rate: 100.00%1350-1400: Matches: 2 (2 won, 0 lost) Experience: 26 (26 points won, 0 lost) Win rate: 100.00%14501400-1400-1450: Matches: 2 (1 won, 1 lost) Experience: 26 (13 points won, 13 lost) Win rate: 50.00%1400-1450: Matches: 2 (1 won, 1 lost) Experience: 26 (13 points won, 13 lost) Win rate: 50.00%15001450-1450-1500: Matches: 9 (7 won, 2 lost) Experience: 117 (91 points won, 26 lost) Win rate: 77.78%1450-1500: Matches: 9 (7 won, 2 lost) Experience: 117 (91 points won, 26 lost) Win rate: 77.78%15501500-1500-1550: Matches: 10 (7 won, 3 lost) Experience: 130 (91 points won, 39 lost) Win rate: 70.00%1500-1550: Matches: 10 (7 won, 3 lost) Experience: 130 (91 points won, 39 lost) Win rate: 70.00%16001550-1550-1600: Matches: 11 (4 won, 7 lost) Experience: 143 (52 points won, 91 lost) Win rate: 36.36%1550-1600: Matches: 11 (4 won, 7 lost) Experience: 143 (52 points won, 91 lost) Win rate: 36.36%16501600-1600-1650: Matches: 12 (6 won, 6 lost) Experience: 148 (78 points won, 70 lost) Win rate: 50.00%1600-1650: Matches: 12 (6 won, 6 lost) Experience: 148 (78 points won, 70 lost) Win rate: 50.00%17001650-1650-1700: Matches: 26 (13 won, 13 lost) Experience: 242 (137 points won, 105 lost) Win rate: 50.00%1650-1700: Matches: 26 (13 won, 13 lost) Experience: 242 (137 points won, 105 lost) Win rate: 50.00%17501700-1700-1750: Matches: 8 (4 won, 4 lost) Experience: 64 (28 points won, 36 lost) Win rate: 50.00%1700-1750: Matches: 8 (4 won, 4 lost) Experience: 64 (28 points won, 36 lost) Win rate: 50.00%18001750-18501800-19001850-1900+ ←1,641.78 When matches were playedJanuary: Matches: 2 (1 won, 1 lost) Experience: 26 (13 points won, 13 lost) Win rate: 50.00% Average opponent rating: 1,701.80 January: Matches: 2 (1 won, 1 lost) Experience: 26 (13 points won, 13 lost) Win rate: 50.00% Average opponent rating: 1,701.80 March: Matches: 5 (4 won, 1 lost) Experience: 65 (52 points won, 13 lost) Win rate: 80.00% Average opponent rating: 1,430.75 March: Matches: 5 (4 won, 1 lost) Experience: 65 (52 points won, 13 lost) Win rate: 80.00% Average opponent rating: 1,430.75 April: Matches: 1 (1 won, 0 lost) Experience: 13 (13 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,509.63 April: Matches: 1 (1 won, 0 lost) Experience: 13 (13 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,509.63 May: Matches: 6 (3 won, 3 lost) Experience: 86 (47 points won, 39 lost) Win rate: 50.00% Average opponent rating: 1,578.30 May: Matches: 6 (3 won, 3 lost) Experience: 86 (47 points won, 39 lost) Win rate: 50.00% Average opponent rating: 1,578.30 June: Matches: 4 (2 won, 2 lost) Experience: 52 (26 points won, 26 lost) Win rate: 50.00% Average opponent rating: 1,512.72 June: Matches: 4 (2 won, 2 lost) Experience: 52 (26 points won, 26 lost) Win rate: 50.00% Average opponent rating: 1,512.72 July: Matches: 20 (11 won, 9 lost) Experience: 140 (87 points won, 53 lost) Win rate: 55.00% Average opponent rating: 1,652.03 July: Matches: 20 (11 won, 9 lost) Experience: 140 (87 points won, 53 lost) Win rate: 55.00% Average opponent rating: 1,652.03 August: Matches: 5 (1 won, 4 lost) Experience: 33 (5 points won, 28 lost) Win rate: 20.00% Average opponent rating: 1,670.28 August: Matches: 5 (1 won, 4 lost) Experience: 33 (5 points won, 28 lost) Win rate: 20.00% Average opponent rating: 1,670.28 September: Matches: 16 (10 won, 6 lost) Experience: 208 (130 points won, 78 lost) Win rate: 62.50% Average opponent rating: 1,587.43 September: Matches: 16 (10 won, 6 lost) Experience: 208 (130 points won, 78 lost) Win rate: 62.50% Average opponent rating: 1,587.43 October: Matches: 10 (5 won, 5 lost) Experience: 130 (65 points won, 65 lost) Win rate: 50.00% Average opponent rating: 1,563.45 October: Matches: 10 (5 won, 5 lost) Experience: 130 (65 points won, 65 lost) Win rate: 50.00% Average opponent rating: 1,563.45 November: Matches: 5 (3 won, 2 lost) Experience: 65 (39 points won, 26 lost) Win rate: 60.00% Average opponent rating: 1,583.06 November: Matches: 5 (3 won, 2 lost) Experience: 65 (39 points won, 26 lost) Win rate: 60.00% Average opponent rating: 1,583.06 December: Matches: 7 (4 won, 3 lost) Experience: 91 (52 points won, 39 lost) Win rate: 57.14% Average opponent rating: 1,642.66 December: Matches: 7 (4 won, 3 lost) Experience: 91 (52 points won, 39 lost) Win rate: 57.14% Average opponent rating: 1,642.66 January: Matches: 2 (1 won, 1 lost) Experience: 26 (13 points won, 13 lost) Win rate: 50.00% Average opponent rating: 1,701.80 January: Matches: 2 (1 won, 1 lost) Experience: 26 (13 points won, 13 lost) Win rate: 50.00% Average opponent rating: 1,701.80 Jan March: Matches: 5 (4 won, 1 lost) Experience: 65 (52 points won, 13 lost) Win rate: 80.00% Average opponent rating: 1,430.75 March: Matches: 5 (4 won, 1 lost) Experience: 65 (52 points won, 13 lost) Win rate: 80.00% Average opponent rating: 1,430.75 Mar April: Matches: 1 (1 won, 0 lost) Experience: 13 (13 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,509.63 April: Matches: 1 (1 won, 0 lost) Experience: 13 (13 points won, 0 lost) Win rate: 100.00% Average opponent rating: 1,509.63 Apr May: Matches: 6 (3 won, 3 lost) Experience: 86 (47 points won, 39 lost) Win rate: 50.00% Average opponent rating: 1,578.30 May: Matches: 6 (3 won, 3 lost) Experience: 86 (47 points won, 39 lost) Win rate: 50.00% Average opponent rating: 1,578.30 May June: Matches: 4 (2 won, 2 lost) Experience: 52 (26 points won, 26 lost) Win rate: 50.00% Average opponent rating: 1,512.72 June: Matches: 4 (2 won, 2 lost) Experience: 52 (26 points won, 26 lost) Win rate: 50.00% Average opponent rating: 1,512.72 Jun July: Matches: 20 (11 won, 9 lost) Experience: 140 (87 points won, 53 lost) Win rate: 55.00% Average opponent rating: 1,652.03 July: Matches: 20 (11 won, 9 lost) Experience: 140 (87 points won, 53 lost) Win rate: 55.00% Average opponent rating: 1,652.03 Jul August: Matches: 5 (1 won, 4 lost) Experience: 33 (5 points won, 28 lost) Win rate: 20.00% Average opponent rating: 1,670.28 August: Matches: 5 (1 won, 4 lost) Experience: 33 (5 points won, 28 lost) Win rate: 20.00% Average opponent rating: 1,670.28 Aug September: Matches: 16 (10 won, 6 lost) Experience: 208 (130 points won, 78 lost) Win rate: 62.50% Average opponent rating: 1,587.43 September: Matches: 16 (10 won, 6 lost) Experience: 208 (130 points won, 78 lost) Win rate: 62.50% Average opponent rating: 1,587.43 Sep October: Matches: 10 (5 won, 5 lost) Experience: 130 (65 points won, 65 lost) Win rate: 50.00% Average opponent rating: 1,563.45 October: Matches: 10 (5 won, 5 lost) Experience: 130 (65 points won, 65 lost) Win rate: 50.00% Average opponent rating: 1,563.45 Oct November: Matches: 5 (3 won, 2 lost) Experience: 65 (39 points won, 26 lost) Win rate: 60.00% Average opponent rating: 1,583.06 November: Matches: 5 (3 won, 2 lost) Experience: 65 (39 points won, 26 lost) Win rate: 60.00% Average opponent rating: 1,583.06 Nov December: Matches: 7 (4 won, 3 lost) Experience: 91 (52 points won, 39 lost) Win rate: 57.14% Average opponent rating: 1,642.66 December: Matches: 7 (4 won, 3 lost) Experience: 91 (52 points won, 39 lost) Win rate: 57.14% Average opponent rating: 1,642.66 Dec 04812162024283236402013201420152015: Matches: 7 (4 won, 3 lost) Experience: 91 (52 points won, 39 lost) Win rate: 57.14% Average opponent rating: 1,493.902015: Matches: 7 (4 won, 3 lost) Experience: 91 (52 points won, 39 lost) Win rate: 57.14% Average opponent rating: 1,493.9020162017201820192019: Matches: 6 (5 won, 1 lost) Experience: 78 (65 points won, 13 lost) Win rate: 83.33% Average opponent rating: 1,537.662019: Matches: 6 (5 won, 1 lost) Experience: 78 (65 points won, 13 lost) Win rate: 83.33% Average opponent rating: 1,537.6620202020: Matches: 9 (5 won, 4 lost) Experience: 117 (65 points won, 52 lost) Win rate: 55.56% Average opponent rating: 1,606.632020: Matches: 9 (5 won, 4 lost) Experience: 117 (65 points won, 52 lost) Win rate: 55.56% Average opponent rating: 1,606.6320212021: Matches: 30 (18 won, 12 lost) Experience: 318 (194 points won, 124 lost) Win rate: 60.00% Average opponent rating: 1,607.812021: Matches: 30 (18 won, 12 lost) Experience: 318 (194 points won, 124 lost) Win rate: 60.00% Average opponent rating: 1,607.8120222022: Matches: 9 (3 won, 6 lost) Experience: 77 (31 points won, 46 lost) Win rate: 33.33% Average opponent rating: 1,627.152022: Matches: 9 (3 won, 6 lost) Experience: 77 (31 points won, 46 lost) Win rate: 33.33% Average opponent rating: 1,627.1520232023: Matches: 4 (3 won, 1 lost) Experience: 52 (39 points won, 13 lost) Win rate: 75.00% Average opponent rating: 1,657.762023: Matches: 4 (3 won, 1 lost) Experience: 52 (39 points won, 13 lost) Win rate: 75.00% Average opponent rating: 1,657.7620242024: Matches: 11 (4 won, 7 lost) Experience: 111 (44 points won, 67 lost) Win rate: 36.36% Average opponent rating: 1,627.092024: Matches: 11 (4 won, 7 lost) Experience: 111 (44 points won, 67 lost) Win rate: 36.36% Average opponent rating: 1,627.0920252025: Matches: 5 (3 won, 2 lost) Experience: 65 (39 points won, 26 lost) Win rate: 60.00% Average opponent rating: 1,575.252025: Matches: 5 (3 won, 2 lost) Experience: 65 (39 points won, 26 lost) Win rate: 60.00% Average opponent rating: 1,575.252026

► Match History

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